diff --git a/src/backend/access/common/tupdesc.c b/src/backend/access/common/tupdesc.c
index 47e80ae..832c3e9 100644
--- a/src/backend/access/common/tupdesc.c
+++ b/src/backend/access/common/tupdesc.c
@@ -902,23 +902,12 @@ BuildDescFromLists(List *names, List *types, List *typmods, List *collations)
 	desc = CreateTemplateTupleDesc(natts);
 
 	attnum = 0;
-
-	l2 = list_head(types);
-	l3 = list_head(typmods);
-	l4 = list_head(collations);
-	foreach(l1, names)
+	forfour(l1, names, l2, types, l3, typmods, l4, collations)
 	{
 		char	   *attname = strVal(lfirst(l1));
-		Oid			atttypid;
-		int32		atttypmod;
-		Oid			attcollation;
-
-		atttypid = lfirst_oid(l2);
-		l2 = lnext(l2);
-		atttypmod = lfirst_int(l3);
-		l3 = lnext(l3);
-		attcollation = lfirst_oid(l4);
-		l4 = lnext(l4);
+		Oid			atttypid = lfirst_oid(l2);
+		int32		atttypmod = lfirst_int(l3);
+		Oid			attcollation = lfirst_oid(l4);
 
 		attnum++;
 
diff --git a/src/backend/executor/execExpr.c b/src/backend/executor/execExpr.c
index db3777d..7cbf9d3 100644
--- a/src/backend/executor/execExpr.c
+++ b/src/backend/executor/execExpr.c
@@ -1683,7 +1683,6 @@ ExecInitExprRec(Expr *node, ExprState *state,
 						   *l_opfamily,
 						   *l_inputcollid;
 				ListCell   *lc;
-				int			off;
 
 				/*
 				 * Iterate over each field, prepare comparisons.  To handle
@@ -1695,20 +1694,11 @@ ExecInitExprRec(Expr *node, ExprState *state,
 				Assert(list_length(rcexpr->opfamilies) == nopers);
 				Assert(list_length(rcexpr->inputcollids) == nopers);
 
-				off = 0;
-				for (off = 0,
-					 l_left_expr = list_head(rcexpr->largs),
-					 l_right_expr = list_head(rcexpr->rargs),
-					 l_opno = list_head(rcexpr->opnos),
-					 l_opfamily = list_head(rcexpr->opfamilies),
-					 l_inputcollid = list_head(rcexpr->inputcollids);
-					 off < nopers;
-					 off++,
-					 l_left_expr = lnext(l_left_expr),
-					 l_right_expr = lnext(l_right_expr),
-					 l_opno = lnext(l_opno),
-					 l_opfamily = lnext(l_opfamily),
-					 l_inputcollid = lnext(l_inputcollid))
+				forfive(l_left_expr, rcexpr->largs,
+						l_right_expr, rcexpr->rargs,
+						l_opno, rcexpr->opnos,
+						l_opfamily, rcexpr->opfamilies,
+						l_inputcollid, rcexpr->inputcollids)
 				{
 					Expr	   *left_expr = (Expr *) lfirst(l_left_expr);
 					Expr	   *right_expr = (Expr *) lfirst(l_right_expr);
diff --git a/src/backend/executor/nodeIndexscan.c b/src/backend/executor/nodeIndexscan.c
index 324356e..8b29437 100644
--- a/src/backend/executor/nodeIndexscan.c
+++ b/src/backend/executor/nodeIndexscan.c
@@ -1332,12 +1332,12 @@ ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
 		{
 			/* (indexkey, indexkey, ...) op (expression, expression, ...) */
 			RowCompareExpr *rc = (RowCompareExpr *) clause;
-			ListCell   *largs_cell = list_head(rc->largs);
-			ListCell   *rargs_cell = list_head(rc->rargs);
-			ListCell   *opnos_cell = list_head(rc->opnos);
-			ListCell   *collids_cell = list_head(rc->inputcollids);
 			ScanKey		first_sub_key;
 			int			n_sub_key;
+			ListCell   *largs_cell;
+			ListCell   *rargs_cell;
+			ListCell   *opnos_cell;
+			ListCell   *collids_cell;
 
 			Assert(!isorderby);
 
@@ -1346,19 +1346,22 @@ ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
 			n_sub_key = 0;
 
 			/* Scan RowCompare columns and generate subsidiary ScanKey items */
-			while (opnos_cell != NULL)
+			forfour(largs_cell, rc->largs, rargs_cell, rc->rargs,
+					opnos_cell, rc->opnos, collids_cell, rc->inputcollids)
 			{
 				ScanKey		this_sub_key = &first_sub_key[n_sub_key];
 				int			flags = SK_ROW_MEMBER;
 				Datum		scanvalue;
 				Oid			inputcollation;
 
+				leftop = (Expr *) lfirst(largs_cell);
+				rightop = (Expr *) lfirst(rargs_cell);
+				opno = lfirst_oid(opnos_cell);
+				inputcollation = lfirst_oid(collids_cell);
+
 				/*
 				 * leftop should be the index key Var, possibly relabeled
 				 */
-				leftop = (Expr *) lfirst(largs_cell);
-				largs_cell = lnext(largs_cell);
-
 				if (leftop && IsA(leftop, RelabelType))
 					leftop = ((RelabelType *) leftop)->arg;
 
@@ -1374,9 +1377,6 @@ ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
 				 * We have to look up the operator's associated btree support
 				 * function
 				 */
-				opno = lfirst_oid(opnos_cell);
-				opnos_cell = lnext(opnos_cell);
-
 				if (index->rd_rel->relam != BTREE_AM_OID ||
 					varattno < 1 || varattno > indnkeyatts)
 					elog(ERROR, "bogus RowCompare index qualification");
@@ -1398,15 +1398,9 @@ ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
 					elog(ERROR, "missing support function %d(%u,%u) in opfamily %u",
 						 BTORDER_PROC, op_lefttype, op_righttype, opfamily);
 
-				inputcollation = lfirst_oid(collids_cell);
-				collids_cell = lnext(collids_cell);
-
 				/*
 				 * rightop is the constant or variable comparison value
 				 */
-				rightop = (Expr *) lfirst(rargs_cell);
-				rargs_cell = lnext(rargs_cell);
-
 				if (rightop && IsA(rightop, RelabelType))
 					rightop = ((RelabelType *) rightop)->arg;
 
diff --git a/src/backend/optimizer/plan/subselect.c b/src/backend/optimizer/plan/subselect.c
index c721054..555c91f 100644
--- a/src/backend/optimizer/plan/subselect.c
+++ b/src/backend/optimizer/plan/subselect.c
@@ -1680,9 +1680,7 @@ convert_EXISTS_to_ANY(PlannerInfo *root, Query *subselect,
 	 */
 	tlist = testlist = paramids = NIL;
 	resno = 1;
-	/* there's no "forfour" so we have to chase one of the lists manually */
-	cc = list_head(opcollations);
-	forthree(lc, leftargs, rc, rightargs, oc, opids)
+	forfour(lc, leftargs, rc, rightargs, oc, opids, cc, opcollations)
 	{
 		Node	   *leftarg = (Node *) lfirst(lc);
 		Node	   *rightarg = (Node *) lfirst(rc);
@@ -1690,7 +1688,6 @@ convert_EXISTS_to_ANY(PlannerInfo *root, Query *subselect,
 		Oid			opcollation = lfirst_oid(cc);
 		Param	   *param;
 
-		cc = lnext(cc);
 		param = generate_new_exec_param(root,
 										exprType(rightarg),
 										exprTypmod(rightarg),
diff --git a/src/backend/optimizer/prep/prepunion.c b/src/backend/optimizer/prep/prepunion.c
index 55eeb51..eb815c2 100644
--- a/src/backend/optimizer/prep/prepunion.c
+++ b/src/backend/optimizer/prep/prepunion.c
@@ -1130,17 +1130,14 @@ generate_setop_tlist(List *colTypes, List *colCollations,
 	TargetEntry *tle;
 	Node	   *expr;
 
-	/* there's no forfour() so we must chase one list manually */
-	rtlc = list_head(refnames_tlist);
-	forthree(ctlc, colTypes, cclc, colCollations, itlc, input_tlist)
+	forfour(ctlc, colTypes, cclc, colCollations,
+			itlc, input_tlist, rtlc, refnames_tlist)
 	{
 		Oid			colType = lfirst_oid(ctlc);
 		Oid			colColl = lfirst_oid(cclc);
 		TargetEntry *inputtle = (TargetEntry *) lfirst(itlc);
 		TargetEntry *reftle = (TargetEntry *) lfirst(rtlc);
 
-		rtlc = lnext(rtlc);
-
 		Assert(inputtle->resno == resno);
 		Assert(reftle->resno == resno);
 		Assert(!inputtle->resjunk);
diff --git a/src/backend/parser/analyze.c b/src/backend/parser/analyze.c
index e3544ef..5efd86e 100644
--- a/src/backend/parser/analyze.c
+++ b/src/backend/parser/analyze.c
@@ -831,18 +831,14 @@ transformInsertStmt(ParseState *pstate, InsertStmt *stmt)
 	 */
 	rte = pstate->p_target_rangetblentry;
 	qry->targetList = NIL;
-	icols = list_head(icolumns);
-	attnos = list_head(attrnos);
-	foreach(lc, exprList)
+	Assert(list_length(exprList) <= list_length(icolumns));
+	forthree(lc, exprList, icols, icolumns, attnos, attrnos)
 	{
 		Expr	   *expr = (Expr *) lfirst(lc);
-		ResTarget  *col;
-		AttrNumber	attr_num;
+		ResTarget  *col = lfirst_node(ResTarget, icols);
+		AttrNumber	attr_num = (AttrNumber) lfirst_int(attnos);
 		TargetEntry *tle;
 
-		col = lfirst_node(ResTarget, icols);
-		attr_num = (AttrNumber) lfirst_int(attnos);
-
 		tle = makeTargetEntry(expr,
 							  attr_num,
 							  col->name,
@@ -851,9 +848,6 @@ transformInsertStmt(ParseState *pstate, InsertStmt *stmt)
 
 		rte->insertedCols = bms_add_member(rte->insertedCols,
 										   attr_num - FirstLowInvalidHeapAttributeNumber);
-
-		icols = lnext(icols);
-		attnos = lnext(attnos);
 	}
 
 	/* Process ON CONFLICT, if any. */
@@ -950,19 +944,16 @@ transformInsertRow(ParseState *pstate, List *exprlist,
 	 * Prepare columns for assignment to target table.
 	 */
 	result = NIL;
-	icols = list_head(icolumns);
-	attnos = list_head(attrnos);
-	foreach(lc, exprlist)
+	forthree(lc, exprlist, icols, icolumns, attnos, attrnos)
 	{
 		Expr	   *expr = (Expr *) lfirst(lc);
-		ResTarget  *col;
-
-		col = lfirst_node(ResTarget, icols);
+		ResTarget  *col = lfirst_node(ResTarget, icols);
+		int			attno = lfirst_int(attnos);
 
 		expr = transformAssignedExpr(pstate, expr,
 									 EXPR_KIND_INSERT_TARGET,
 									 col->name,
-									 lfirst_int(attnos),
+									 attno,
 									 col->indirection,
 									 col->location);
 
@@ -991,9 +982,6 @@ transformInsertRow(ParseState *pstate, List *exprlist,
 		}
 
 		result = lappend(result, expr);
-
-		icols = lnext(icols);
-		attnos = lnext(attnos);
 	}
 
 	return result;
@@ -1699,11 +1687,11 @@ transformSetOperationStmt(ParseState *pstate, SelectStmt *stmt)
 	qry->targetList = NIL;
 	targetvars = NIL;
 	targetnames = NIL;
-	left_tlist = list_head(leftmostQuery->targetList);
 
-	forthree(lct, sostmt->colTypes,
-			 lcm, sostmt->colTypmods,
-			 lcc, sostmt->colCollations)
+	forfour(lct, sostmt->colTypes,
+			lcm, sostmt->colTypmods,
+			lcc, sostmt->colCollations,
+			left_tlist, leftmostQuery->targetList)
 	{
 		Oid			colType = lfirst_oid(lct);
 		int32		colTypmod = lfirst_int(lcm);
@@ -1729,7 +1717,6 @@ transformSetOperationStmt(ParseState *pstate, SelectStmt *stmt)
 		qry->targetList = lappend(qry->targetList, tle);
 		targetvars = lappend(targetvars, var);
 		targetnames = lappend(targetnames, makeString(colName));
-		left_tlist = lnext(left_tlist);
 	}
 
 	/*
@@ -2201,10 +2188,9 @@ determineRecursiveColTypes(ParseState *pstate, Node *larg, List *nrtargetlist)
 	 * dummy result expressions of the non-recursive term.
 	 */
 	targetList = NIL;
-	left_tlist = list_head(leftmostQuery->targetList);
 	next_resno = 1;
 
-	foreach(nrtl, nrtargetlist)
+	forboth(nrtl, nrtargetlist, left_tlist, leftmostQuery->targetList)
 	{
 		TargetEntry *nrtle = (TargetEntry *) lfirst(nrtl);
 		TargetEntry *lefttle = (TargetEntry *) lfirst(left_tlist);
@@ -2218,7 +2204,6 @@ determineRecursiveColTypes(ParseState *pstate, Node *larg, List *nrtargetlist)
 							  colName,
 							  false);
 		targetList = lappend(targetList, tle);
-		left_tlist = lnext(left_tlist);
 	}
 
 	/* Now build CTE's output column info using dummy targetlist */
diff --git a/src/backend/parser/parse_func.c b/src/backend/parser/parse_func.c
index 5222231..654ee80 100644
--- a/src/backend/parser/parse_func.c
+++ b/src/backend/parser/parse_func.c
@@ -2124,13 +2124,12 @@ LookupFuncWithArgs(ObjectType objtype, ObjectWithArgs *func, bool noError)
 							   FUNC_MAX_ARGS,
 							   FUNC_MAX_ARGS)));
 
-	args_item = list_head(func->objargs);
-	for (i = 0; i < argcount; i++)
+	i = 0;
+	foreach(args_item, func->objargs)
 	{
 		TypeName   *t = (TypeName *) lfirst(args_item);
 
-		argoids[i] = LookupTypeNameOid(NULL, t, noError);
-		args_item = lnext(args_item);
+		argoids[i++] = LookupTypeNameOid(NULL, t, noError);
 	}
 
 	/*
diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c
index 1258092..85055bb 100644
--- a/src/backend/utils/adt/ruleutils.c
+++ b/src/backend/utils/adt/ruleutils.c
@@ -9811,31 +9811,18 @@ get_tablefunc(TableFunc *tf, deparse_context *context, bool showimplicit)
 		ListCell   *l5;
 		int			colnum = 0;
 
-		l2 = list_head(tf->coltypes);
-		l3 = list_head(tf->coltypmods);
-		l4 = list_head(tf->colexprs);
-		l5 = list_head(tf->coldefexprs);
-
 		appendStringInfoString(buf, " COLUMNS ");
-		foreach(l1, tf->colnames)
+		forfive(l1, tf->colnames, l2, tf->coltypes, l3, tf->coltypmods,
+				l4, tf->colexprs, l5, tf->coldefexprs)
 		{
 			char	   *colname = strVal(lfirst(l1));
-			Oid			typid;
-			int32		typmod;
-			Node	   *colexpr;
-			Node	   *coldefexpr;
-			bool		ordinality = tf->ordinalitycol == colnum;
+			Oid			typid = lfirst_oid(l2);
+			int32		typmod = lfirst_int(l3);
+			Node	   *colexpr = (Node *) lfirst(l4);
+			Node	   *coldefexpr = (Node *) lfirst(l5);
+			bool		ordinality = (tf->ordinalitycol == colnum);
 			bool		notnull = bms_is_member(colnum, tf->notnulls);
 
-			typid = lfirst_oid(l2);
-			l2 = lnext(l2);
-			typmod = lfirst_int(l3);
-			l3 = lnext(l3);
-			colexpr = (Node *) lfirst(l4);
-			l4 = lnext(l4);
-			coldefexpr = (Node *) lfirst(l5);
-			l5 = lnext(l5);
-
 			if (colnum > 0)
 				appendStringInfoString(buf, ", ");
 			colnum++;
@@ -10349,12 +10336,11 @@ get_from_clause_coldeflist(RangeTblFunction *rtfunc,
 
 	appendStringInfoChar(buf, '(');
 
-	/* there's no forfour(), so must chase one list the hard way */
 	i = 0;
-	l4 = list_head(rtfunc->funccolnames);
-	forthree(l1, rtfunc->funccoltypes,
-			 l2, rtfunc->funccoltypmods,
-			 l3, rtfunc->funccolcollations)
+	forfour(l1, rtfunc->funccoltypes,
+			l2, rtfunc->funccoltypmods,
+			l3, rtfunc->funccolcollations,
+			l4, rtfunc->funccolnames)
 	{
 		Oid			atttypid = lfirst_oid(l1);
 		int32		atttypmod = lfirst_int(l2);
@@ -10378,7 +10364,6 @@ get_from_clause_coldeflist(RangeTblFunction *rtfunc,
 			appendStringInfo(buf, " COLLATE %s",
 							 generate_collation_name(attcollation));
 
-		l4 = lnext(l4);
 		i++;
 	}
 
diff --git a/src/include/nodes/pg_list.h b/src/include/nodes/pg_list.h
index 4624604..8dd22e7 100644
--- a/src/include/nodes/pg_list.h
+++ b/src/include/nodes/pg_list.h
@@ -205,6 +205,32 @@ list_length(const List *l)
 		 (cell1) != NULL && (cell2) != NULL && (cell3) != NULL;		\
 		 (cell1) = lnext(cell1), (cell2) = lnext(cell2), (cell3) = lnext(cell3))
 
+/*
+ * forfour -
+ *	  the same for four lists
+ */
+#define forfour(cell1, list1, cell2, list2, cell3, list3, cell4, list4) \
+	for ((cell1) = list_head(list1), (cell2) = list_head(list2), \
+		 (cell3) = list_head(list3), (cell4) = list_head(list4); \
+		 (cell1) != NULL && (cell2) != NULL && \
+		 (cell3) != NULL && (cell4) != NULL; \
+		 (cell1) = lnext(cell1), (cell2) = lnext(cell2), \
+		 (cell3) = lnext(cell3), (cell4) = lnext(cell4))
+
+/*
+ * forfive -
+ *	  the same for five lists
+ */
+#define forfive(cell1, list1, cell2, list2, cell3, list3, cell4, list4, cell5, list5) \
+	for ((cell1) = list_head(list1), (cell2) = list_head(list2), \
+		 (cell3) = list_head(list3), (cell4) = list_head(list4), \
+		 (cell5) = list_head(list5); \
+		 (cell1) != NULL && (cell2) != NULL && (cell3) != NULL && \
+		 (cell4) != NULL && (cell5) != NULL; \
+		 (cell1) = lnext(cell1), (cell2) = lnext(cell2), \
+		 (cell3) = lnext(cell3), (cell4) = lnext(cell4), \
+		 (cell5) = lnext(cell5))
+
 extern List *lappend(List *list, void *datum);
 extern List *lappend_int(List *list, int datum);
 extern List *lappend_oid(List *list, Oid datum);